Preparation method of compressed rubber wood with stable size and mildew resistance

A dimensionally stable and rubberwood technology, applied in pressurized wood treatment, wood heating, tool manufacturing, etc., can solve the problems of easy deformation, mildew and blue stain, low density of rubber wood, etc., and achieve improved impact strength and stable dimensions Good sex and mildew resistance, high density effect

Pending Publication Date: 2022-06-17
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention aims to solve the problems of rubber wood with low density, poor material properties, easy deformation, ...

Method used

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  • Preparation method of compressed rubber wood with stable size and mildew resistance
  • Preparation method of compressed rubber wood with stable size and mildew resistance
  • Preparation method of compressed rubber wood with stable size and mildew resistance

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specific Embodiment approach 1

[0029] Embodiment 1: The present embodiment is a preparation method of dimensionally stable and mildew-proof compressed rubber wood, which is carried out according to the following steps:

[0030] 1. Preparation of water-soluble acylated lignin solution:

[0031] The water-soluble acylated lignin is added to the water, and the pH of the solution is adjusted to the pH of rubber wood, and then an initiator and a catalyst are added to obtain a water-soluble acylated lignin solution;

[0032] The mass percentage of the water-soluble acylated lignin in the water-soluble acylated lignin solution is 5% to 15%; the mass percentage of the initiator in the water-soluble acylated lignin solution is 0.5% to 2%; The mass percentage of the catalyst in the water-soluble acylated lignin solution is 0% to 5%;

[0033] 2. Water-soluble acylated lignin solution impregnating rubber wood:

[0034] Immerse the rubber wood in the water-soluble acylated lignin solution, and then under the condition...

specific Embodiment approach 2

[0053] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the water-soluble acylated lignin described in Step 1 is prepared according to the following steps:

[0054] ①. Dissolve the dealkalized lignin in dimethyl sulfoxide, and heat it up to 80 °C, add maleic anhydride and anhydrous pyridine at a temperature of 80 °C, and then heat up to 100 °C, at a temperature of Under the condition of 100 °C, the reaction was carried out for 1 h to obtain a mixed system;

[0055] The quality of the dealkalized lignin and the volume ratio of dimethyl sulfoxide are 1g: 5mL; the mass ratio of the dealkalized lignin and maleic anhydride is 1:1.47; the dealkalized lignin The volume ratio of the mass and anhydrous pyridine is 1g: 2.41mL;

[0056] 2. Disperse the mixed system in a poor solvent, precipitate and centrifuge to remove the supernatant to obtain the bottom product;

[0057] 3. Dissolving the bottom product in dimethyl sulfoxide to obtain a bottom product so...

specific Embodiment approach 3

[0058] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the poor solvent described in step ② is ethyl acetate or ethanol. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a preparation method of compressed rubber wood, in particular to a preparation method of compressed rubber wood with stable size and mildew resistance. The problems that rubber wood is low in density, poor in wood property, prone to deformation and prone to mildewing and blue stain are solved. The treatment method comprises the following steps: 1, preparing a water-soluble acylated lignin solution; 2, dipping the rubber wood in a water-soluble acylated lignin solution; thirdly, hot-pressing densification treatment is conducted on the impregnated rubber wood; and 4, drying and curing. The method is used for preparing the compressed rubber wood which is stable in size and mildew-proof.

Description

technical field [0001] The present invention relates to a preparation method of compressed rubber wood. Background technique [0002] Rubber tree is one of the important tropical economic crops in my country. It is mainly used for the production of natural latex and is planted in large quantities in Hainan, Yunnan, Guangdong and other regions of my country. When the rubber production capacity of rubber trees declines, a large amount of rubber wood can be obtained by new felling. The annual output of rubber wood logs in my country is about 2 million m3 3 , Now rubber wood is one of the important wood sources in my country. Rubber wood is a fast-growing wood with excellent characteristics such as elegant color and easy processing. However, compared with other precious woods, rubber wood has a large number of macroporous structures for the transmission of nutrients, and parenchyma cells contain a large amount of starch, protein and other substances for glue production and deg...

Claims

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Application Information

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IPC IPC(8): B27K3/08B27K5/00B27K5/04
CPCB27K3/08B27K5/001B27K5/007B27K5/04
Inventor 王永贵高至尊谢延军邱煜轩余海王文静肖泽芳王海刚
Owner NORTHEAST FORESTRY UNIVERSITY
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